Opus makes the better water. Astra makes the better jelly.
Same prompt: a jelly world with its own island, Claude Opus 5.5 vs ChatGPT-6 Astra.
The tester prefers Opus's water: transparent, full of reflections, and a whole storm from moving the mouse. But Astra feels more like jelly. The edges bend and the whole island wobbles.
Estimated API cost: Opus $15.54, Astra $10.51. About $5 more for the water.
Would you pay extra for Opus or pick Astra?
(Test and clip by @vib3coded )